The Lift Backup System with Pure Sine Wave Output has high inrush/peak current handling capacity. Bhawani Digital Systems Pvt. Ltd. Supplies Lift Backup System with Pure Sine Wave Output. Bhawani Digital Systems Pvt. Ltd. Is an ISO 9001:2008 registered organization that manufactures Voltage Stabilizers/Correctors, Inverters, Transformers, UPS Systems, Automatic Voltage Regulators, Constant Voltage Transformer, Power Supply, Battery and Chargers. The Lift Backup System of EB Series has pure sine wave output.